package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.BaseException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.amqp.AmqpException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
//    @Autowired
//    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    @Value("${sky.shop.address}")
    private String shopAddress;
    @Value("${sky.gaode.key}")
    private String key;

    @Autowired
    private RabbitTemplate rabbitTemplate;
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        // 配送距离超出限制
        checkoutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));//设置订单号，使用时间戳来代替
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //向延迟交换机发送消息，完成超时未支付取消功能
        rabbitTemplate.convertAndSend("order.delayed.exchange", "order.delayed", order.getId(), new MessagePostProcessor() {
            @Override
            public Message postProcessMessage(Message message) throws AmqpException {
                // 添加延迟消息属性,单位是ms
                message.getMessageProperties().setDelay(15 * 60 * 1000);
                return message;
            }
        });

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.cleanShoppingCartByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 配送距离有没有超出范围
     * @param userAddress 用户地址
     */
    private void checkoutOfRange(String userAddress) {
        // 1.获取商家和用户具体位置的经纬度
        String userLngLat = getCoordinatesFromAmap(userAddress);
        String shopLngLat = getCoordinatesFromAmap(shopAddress);
        // 2.路径规划
        // 2.1 设置请求参数
        Map<String,String> map =  new HashMap<>();
        map.put("origin", String.valueOf(shopLngLat));
        map.put("destination", String.valueOf(userLngLat));
        map.put("key", key);
        // 2.2 发送请求
        String response = HttpClientUtil.doGet("https://restapi.amap.com/v3/direction/driving", map);
        // 3.解析返回值
        JSONObject jsonObject = JSON.parseObject(response);
        if (!"1".equals(jsonObject.getString("status"))) {
            throw new OrderBusinessException("配送路线规划失败");
        }
        JSONObject route = jsonObject.getJSONObject("route");
        JSONArray paths = route.getJSONArray("paths");
        Integer distance = paths.getJSONObject(0).getInteger("distance");
        // 3.是否超出配送距离
        if (distance > 10000) {
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 解析具体位置信息 ，获取经纬度
     * @param address
     * @return
     */
    private String getCoordinatesFromAmap(String address) {
        // 设置请求参数
        Map<String, String> map =  new HashMap<>();
        map.put("key",key);
        map.put("address",address);
        map.put("output","json");
        // 使用高德地图的 Geocoding API 解析地址
        String response = HttpClientUtil.doGet("https://restapi.amap.com/v3/geocode/geo", map);
        JSONObject jsonObject = JSON.parseObject(response);
        if(!jsonObject.getString("status").equals("1")){
            throw new OrderBusinessException("店铺地址解析失败");
        }
        String location = jsonObject.getJSONArray("geocodes").getJSONObject(0).getString("location");
        return location;
    }

    /**
     * 订单支付
     */
    @Override
    public void payment(OrdersPaymentDTO ordersPaymentDTO) {
        // TODO: 2024/4/21  付款功能暂不实现
        //根据订单号获取该订单
        Orders orders = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());

        if (orders.getPayStatus() == Orders.PAID){
            //如果该订单已经支付成功，无需再次支付
            throw new BaseException("该订单已支付成功，无需重复支付");
        }
        //还没有支付的话，设置支付状态为已付款,设置结账时间,设置订单状态为待接单
        orders.setPayStatus(Orders.PAID);
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        //更新订单
        orderMapper.update(orders);

        //通过websocket向商家客户端(浏览器)推送来单提醒
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("type",1);//1表示来单提醒，2表示催单
        jsonObject.put("content","订单号：" + orders.getNumber());
        jsonObject.put("orderId",orders.getId());
        String json = jsonObject.toJSONString();//将JSONObject对象转为json字符串
        webSocketServer.sendToAllClient(json);
    }
//    /**
//     * 订单支付
//     *
//     * @param ordersPaymentDTO
//     * @return
//     */
//    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
////        JSONObject jsonObject = weChatPayUtil.pay(
////                ordersPaymentDTO.getOrderNumber(), //商户订单号
////                new BigDecimal(0.01), //支付金额，单位 元
////                "苍穹外卖订单", //商品描述
////                user.getOpenid() //微信用户的openid
////        );
//        JSONObject jsonObject = new JSONObject();
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
//    }
//
//    /**
//     * 支付成功，修改订单状态
//     *
//     * @param outTradeNo
//     */
//    public void paySuccess(String outTradeNo) {
//
//        // 根据订单号查询订单
//        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
//
//        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
//        Orders orders = Orders.builder()
//                .id(ordersDB.getId())
//                .status(Orders.TO_BE_CONFIRMED)
//                .payStatus(Orders.PAID)
//                .checkoutTime(LocalDateTime.now())
//                .build();
//
//        orderMapper.update(orders);
//
//        //通过websocket向客户端浏览器推送消息
//        Map map = new HashMap<>();
//        map.put("type",1);//1表示来单提醒，2表示客户催单
//        map.put("orderId",ordersDB.getId());
//        map.put("content","订单号：" + outTradeNo);
//
//        String json = JSON.toJSONString(map);
//        webSocketServer.sendToAllClient(json);
//    }


    /**
     * 用户端订单分页查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据id查看订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //先查询订单
        Orders orders = orderMapper.getById(id);

        //在查询详细表
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //封装数据
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     * @param id
     */
    @Transactional
    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // TODO: 2024/4/21 :暂时不设置退款功能 
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repition(Long id) {
        //获得订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //讲订单详情的信息转换为购物车信息
        List<ShoppingCart> shoppingCartList = new ArrayList<>();

        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setUserId(BaseContext.getCurrentId());

            shoppingCartList.add(shoppingCart);
        }

        //批量插入数据库中
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 确认接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒绝接单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        //订单状态是待接单，可以拒绝接单，并填写拒单原因，并退款
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());

        if (ordersDB.getPayStatus().equals(Orders.PAID)){
            //还需要退款
            // TODO: 2024/4/22 暂不实现退款功能
            orders.setPayStatus(Orders.REFUND);
        }

        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void adminCancel(OrdersCancelDTO ordersCancelDTO) {
        //把订单状态改为已取消，如果用户付款，还需要退款
        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .status(Orders.CANCELLED)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();

        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        if (ordersDB.getPayStatus().equals(Orders.PAID)){
            // TODO: 2024/4/22 退款功能 暂不实现
            orders.setPayStatus(Orders.REFUND);
        }

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        //如果订单为null或者订单的状态不是已接单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        //只有订单状态在派送中才可以点击完成订单
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 用户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //通过websocket向商家客服端发送消息
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("type",2);
        jsonObject.put("orderId",id);
        jsonObject.put("content","订单号：" + ordersDB.getNumber());
        String json = jsonObject.toJSONString();
        webSocketServer.sendToAllClient(json);
    }
}
